Quercus Garryana, or more commonly know as Oregon White Oak, is a tree shrub with green foliage and yellow flowers of the genus Quercus. It has a slow growth rate and a height of 80 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during mid spring, is intolerant of shade and is routinely available commercially. Quercus Garryana or Oregon White Oak's floral region is North America US Lower 48, specifically in the states of California, Oregon and Washington.